Well, now we have some built motor numbers and they exceed anyone's expectations. The Kratos KRAS55Bi turbos are touching just shy of 1000 rear wheel horsepower (with potential to eclipse that number).

A built S55 obviously can be tuned more aggressively and torque can be ramped in harder and earlier.

Graph:

Notice how once spooled how well the torque curve holds until redline. Power just continues to build from 600 wheel horsepower to 975 wheel horsepower. It almost reminds you of a classic M motor curve.

This Dyno Graph depicts the preliminary capabilities of the KRAS55Bi on a built engine BMW S55 with supporting modifications as listed above at 35psi on Pump E85 Fuel (E78 Via Fuel-It Sensor). These results are preliminary; the motor has just been completed and much testing/tuning is left to do. This dyno graph clearly proves the power and flow capabilities still left on the table for the KRAS55Bi as the powerband continues to climb to the rev limiter as well as how flat and wide the torque band is. These results are indicative of the combination of our compressor wheel, turbine wheel, and manifold A/R Ratio design. The cylinder head from Headgames Motorworks only further proves the KRAS55Bi's capabilities by overcoming the limitations of the factory cylinder head/valvetrain allowing the turbo system to shine.

Before people start criticizing for the lack of RPM on the axis:

Originally Posted by Kratos

Note: This 975whp dyno is shown with vehicle speed instead of rpm on the x-axis due to a signal loss during the run file. The 970whp run listed below is with rpm on the x-axis which clearly shows the run being cut early as a result of the signal loss.

The important aspect to focus on here is how the Kratos KRAS55Bi turbo curve looks overlaid on the stock turbochargers. It is almost hard to believe how little loss in spool there is. Where is the big sacrifice for top end punch? There isn't one.

The difference at redline is almost 500 whp over a tuned stock turbo setup with an ethanol blend.

Originally Posted by Kratos

This Dyno Graph depicts the massive difference in power and torque output of the KRAS55Bi on a built engine vs. a full bolt on BM3 tune stock turbo on E30. Notice at approximately 7300 rpm there is a difference of 479whp and 356wtq between the stock turbos and the KRAS55Bi's. These figures are used for reference only, but they do give the end user an idea as to the difference of power and torque that can be achieved when upgrading from a stock OEM turbo system on E30 to a KRAS55Bi on Pump E85 with built engine.

S55 engine pictured with Kratos inlets:

It is important to focus on more than just peak figures. No doubt people will see quadruple digit numbers and the peak figure will get their attention but the area under the curve here on display here is unparalleled for the platform.

Originally Posted by Kratos

The KRATOS brand has maintained focus on never sacrificing drivability and reliability for the sake of power output. There is a common misconception that you must sacrifice one to achieve the other, this is often the mindset of those who opt to outfit their vehicles with large custom single turbo or large custom twin turbo kits.

KRATOS offers large single turbo peak power with OEM twin turbo drivability and increased reliability.

The KRAS55 line is a complete solution and can effectively be used to power your drag car, road course car, or daily driver and ideally meeting all of the requirements of a turbo system for each application

The engineering team at KRATOS has over 25 years of experience in turbo design and manufacturing. Rather than taking a universal turbocharger and custom designing a system around it, KRATOS has the ability and expertise to utilize the latest and most modern tools and techniques the turbocharging industry has to offer. This allows us the ability to develop vehicle specific turbo system that offer increased reliability with stock style drivability at horsepower levels that meet or exceed custom single turbo or large twin turbo kits. The notion that custom large single turbo or large twin turbos are required to produce high output figures is now a moot point. Customers no longer have to sacrifice stock style twin turbo drivability producing less than stock horsepower below 4K rpm with custom single or large twin turbo kits.
975whp

They are delivering as promised and even exceeding expectations. Keep in mind these are the KRA55Bi ball bearing turbochargers and the titanium KRAS55Ti are still coming.

Originally Posted by Kratos

975whp on a system rated for 850whp?

KRATOS never rates systems at maximum capacity but rates systems at a conservative figure of approximately 85% of maximum output capacity within the confines of the factory MAP sensor for the KRAS55. That being said, these dyno figures show the flow capabilities and potential of the KRAS55Bi with readily available off the shelf parts that any S55 owner has the potential to replicate without having to upgrade to a larger 5 bar MAP Sensor.

Transparency is a major part of the KRATOS business model. That being said, there is no secret recipe required to achieve these type of results. Anyone can achieve these figures with off the shelf parts as listed above. This is an example of our extended efforts to maintain the utmost transparency with our customers and not mislead them to unrealistic expectations. As the old adage goes, it is always better to under promise and over deliver than over promise and under deliver.

So when will these be available? Well, you can get them next month and pre-orders will be honored first. Expect these to sell fast:

Originally Posted by Kratos

Availability
At time of publishing, all non-manifold components of the KRAS55 line are completed and ready for assembly. Final machining of the manifolds is scheduled to be completed before the close of this month.

To those who have been following the developments of the KRAS55 line, we are happy to inform that these dates will be final and turbos will be shipping in early March to customers.

Pre-orders:
Pre-orders will consist of a $500 refundable deposit meant to signal intent of purchase. Please contact a representative at info@asrkratos.com for more information regarding pre-ordering a KRAS55Bi system.

It looks like going big single on an S55 is pretty much pointless, unless you are aiming for 1000+ WHP figures. Too bad they didn't have anything like this for the N54 back when I had mine (pretty sure they still don't)!

It looks like going big single on an S55 is pretty much pointless, unless you are aiming for 1000+ WHP figures. Too bad they didn't have anything like this for the N54 back when I had mine (pretty sure they still don't)!

One of the guidelines behind our turbo technology is to be able to offer the best of both worlds without having to sacrifice drivability or durability. Even if you're aiming for 1000+whp, our KRAS55Bi and Ti options both support flow capabilities to meet or exceed those goals with the proper supporting modifications as we will soon show.